Plastic refractories have often been defined as firebrick in plastic or moldable form. They are commonly rammed into place by hand, or by the use of special rammers. The application covers a wide range of boilers, soaking pits, slab and billet heating furnaces, forge furnaces and many others’ special furnace. The plastics have demonstrated their superiority. A properly installed plastic lining has many advantages. 1.Eliminates joints. 2.Install quickly and not necessary for the special brick shapes or sizes. 3.Lower thermal conductivity than brick. 4.High thermal shock resistance. 5.Can be securely anchored to a back-up wall or steel casing, forming bulge-proof walls.